Eukaryotic small ribosomal subunit (40S)
SMALL RIBOSOMAL SUBUNIT OF EUKARYOTIC 80S RIBOSOMES
40S; Eukaryotic Small Ribosomal Subunit (40S); 40S subunit
The eukaryotic small ribosomal subunit (40S) is the smaller subunit of the eukaryotic 80S ribosomes, with the other major component being the large ribosomal subunit (60S). The "40S" and "60S" names originate from the convention that ribosomal particles are denoted according to their sedimentation coefficients in Svedberg units.